CN110095849B

CN110095849B - Optical unit with shake correction function

Info

Publication number: CN110095849B
Application number: CN201910062057.7A
Authority: CN
Inventors: 南泽伸司
Original assignee: Nidec Sankyo Corp
Current assignee: Nidec Instruments Corp
Priority date: 2018-01-29
Filing date: 2019-01-23
Publication date: 2021-07-09
Anticipated expiration: 2039-01-23
Also published as: US11243409B2; US20190235267A1; TW201940931A; JP2019132908A; CN110095849A; TWI717682B; JP6999435B2

Abstract

The invention provides an optical unit with a shake correction function, which reliably limits a swing allowable range, reduces the movement of a movable body in an optical axis direction when a drop impact or the like occurs, realizes miniaturization, and improves durability, and comprises: a fixed body; a movable body having an optical element; a swing support mechanism swingably supporting the movable body with respect to the fixed body; and a shake correction drive mechanism that swings the movable body, wherein the movable body is provided with a first contact portion that contacts a first stopper portion of the fixed body when swinging is maximum, and a second contact portion that contacts a second stopper portion of the fixed body when moving in the optical axis direction of the optical element, the second stopper portion being spaced apart from the second contact portion by a space that does not come into contact when the movable body swings, and a distance along the optical axis direction between the second stopper portion and the second contact portion is set smaller than a distance along the optical axis direction between the first contact portion and the fixed body.

Description

Optical unit with shake correction function

Technical Field

The present invention relates to an optical unit with a shake correction function for correcting shake of an optical module mounted in a mobile terminal with a camera or the like.

Background

In an optical unit used in an optical device such as an imaging device mounted on a mobile terminal, a drive recorder (drive recorder), an unmanned helicopter, or the like, in order to suppress disturbance of a captured image due to shaking, a function of swinging an optical module and correcting the shaking to eliminate the shaking has been developed. The shake correction function employs the following configuration: an optical module including an optical element is swingably supported with respect to a fixed body including a housing of an optical apparatus, and the optical module is swung in accordance with a shake by a shake correction drive mechanism.

The drive mechanism for correcting shaking is provided with a magnet and a coil, and is configured to: the current flows through the coil in the magnetic field of the magnet, and the electromagnetic force is applied to the optical module to drive the optical module.

Further, for example, patent document 1 discloses a configuration in which: the optical module is swingably supported by a pivot shaft provided on the rear side in the optical axis direction of the optical module, and the shake is corrected by swinging the optical module (movable body) about the pivot shaft.

On the other hand, a structure is also provided in which an optical module is swingably supported by a gimbal mechanism, and patent document 2 discloses a gimbal mechanism using plate-shaped springs having fulcrums provided in two directions orthogonal to the optical axis direction.

In the optical unit with shake correction function, when the movable body including the optical module that swings in accordance with shake excessively swings, the following situation may occur: deformation of the gimbal mechanism or the like occurs, and the subsequent operation is hindered.

Therefore, in patent document 2, a stopper is provided to limit the allowable range of swing of the movable body. In this case, a convex portion is provided on the upper end of the holder holding the coil so as to protrude upward, and a buffer member is provided on the back surface of the cover covering the fixed body such as the holder, and the buffer member is disposed above the convex portion of the holder.

[ Prior art documents ]

[ patent document ]

[ patent document 1] Japanese patent laid-open No. 2009-294393

[ patent document 2] Japanese patent laid-open No. 2016-61958

Disclosure of Invention

[ problems to be solved by the invention ]

In addition, as the allowable range of the swing of the movable body, the attitude of the shake correction drive mechanism in the non-excited state (state in which no current flows through the coil) is set to, for example, ± 10 °, but in the stopper structure described in patent document 2, a gap of, for example, about 1mm to 2mm needs to be provided between the convex portion of the holder and the buffer member of the cover as a distance corresponding to the height in the optical axis direction corresponding to the allowable range of the swing.

Since the gap is large, there is a possibility that the movable body including the optical module may extend in the optical axis direction by a distance corresponding to the gap when a drop impact or the like occurs. Therefore, in order to prevent the movable body from colliding with the cover glass of the fixed body disposed in front of the movable body, the gap needs to be increased, and the device tends to be large in size. Further, the amount of flexure of the gimbal mechanism increases as the gap increases, and the durability may be impaired.

The present invention has been made in view of the above circumstances, and an object thereof is to surely restrict a swing allowable range, to reduce a movement of a movable body in an optical axis direction at the time of a drop impact or the like, to realize a reduction in size, and to improve durability.

[ means for solving problems ]

An optical unit with a shake correction function according to the present invention includes: a fixed body; a movable body having an optical element; a swing support mechanism swingably supporting the movable body with respect to the fixed body; and a shake correction drive mechanism that swings the movable body, wherein the movable body is provided with a first contact portion that contacts a first stopper portion of the fixed body when swinging is maximized, and a second contact portion that contacts a second stopper portion of the fixed body when moving in the optical axis direction of the optical axis of the optical element, the second stopper portion and the second contact portion being spaced apart from each other at a non-contact interval when the movable body swings, and a distance in the optical axis direction between the second stopper portion and the second contact portion is set smaller than a distance in the optical axis direction between the first contact portion and the fixed body.

When an impact is applied by dropping or the like and the movable body attempts to move in the optical axis direction, the movement of the movable body can be restricted to a small distance by the second contact portion of the movable body coming into contact with the second stopper portion of the fixed body. In the above-described oscillation correction, the second contact portion does not contact the second stopper portion, and therefore the oscillation of the movable body is not hindered.

Further, since the distance in the optical axis direction between the second stopper portion and the second abutting portion is set smaller than the distance in the optical axis direction between the first abutting portion and the fixed body, the movement of the movable body in the optical axis direction can be reduced as compared with the case where the second stopper portion and the second abutting portion are not provided, and accordingly, the overall size in the optical axis direction can be reduced, and downsizing can be achieved.

In a preferred embodiment of the optical unit with shake correction function according to the present invention, the second contact portion and the second stopper portion are formed as inclined surfaces inclined in a direction toward the optical axis as the inclined surfaces are closer to the object side.

When viewed from the object side in the optical axis direction, the second stopper portion hides the second contact portion, so that it is possible to prevent foreign matter such as dust from entering between the second stopper portion and the second contact portion.

In a preferred embodiment of the optical unit with shake correction function according to the present invention, the second contact portion and the second stopper portion are formed as arc surfaces around a pivot of the movable body.

The distance between the second abutting portion and the second stopper portion can be fixed in the swing correction, and therefore the distance can be further reduced.

In a preferred embodiment of the optical unit with shake correction function according to the present invention, the second contact portion and the second stopper portion are provided in a ring shape extending in a circumferential direction around the optical axis.

That is, the movable body can swing in either direction, and the moving range thereof can be appropriately limited.

When the second contact portion and the first stopper portion are inclined surfaces, the second stopper portion of the fixed body hides the second contact portion of the movable body over the entire circumference when viewed from the object side in the optical axis direction, and therefore, the design is excellent and intrusion of foreign matter such as dust can be reliably prevented.

In a preferred embodiment of the optical unit with shake correction function according to the present invention, the second contact portion and the second stopper portion are disposed so that at least a part thereof overlaps the optical axis direction when the shake correction drive mechanism maximizes the swing.

When the shake occurs due to the shake correction, even when an external force acts in the optical axis direction, the second contact portion comes into contact with the second stopper portion, and therefore the moving range of the movable body can be appropriately limited.

In a preferred embodiment of the optical unit with shake correction function according to the present invention, the movable body includes: an optical module having the optical element; and a center of gravity adjusting member provided on an object side of the optical module in the optical axis direction for adjusting a center of gravity position of the movable body in the optical axis direction, wherein the center of gravity adjusting member is provided with the second abutting portion.

The center of gravity of the movable body can be made to coincide with or approach the center of swing by the center of gravity adjusting means, and the movable body can be effectively swung. Further, since the second contact portion is provided in the center of gravity adjustment member, the influence on the optical module at the time of impact can be reduced as compared with the case where the second contact portion is provided in the optical module.

In a preferred embodiment of the optical unit with shake correction function according to the present invention, the shake correction drive mechanism includes a magnet and a coil, one of the magnet and the coil is provided on the fixed body, and the other of the magnet and the coil is provided on the movable body, and the first contact portion is provided on a holding member for holding the magnet or the coil on the movable body.

In the movable body, since the member holding the coil or the magnet of the drive mechanism for correcting shake also serves as the first contact portion, the number of components can be reduced as compared with a case where the first contact portion is separately provided.

[ Effect of the invention ]

According to the present invention, the allowable range of the swing can be surely restricted, and the movement of the movable member in the optical axis direction at the time of a drop impact or the like can be reduced, thereby achieving downsizing and improving durability.

Drawings

Fig. 1 is a perspective view of an assembled state of an optical unit with a shake correction function according to a first embodiment of the present invention.

Fig. 2 is a plan view of the optical unit with shake correction function of the first embodiment.

Fig. 3 is a side view of the optical unit with shake correction function of the first embodiment.

Fig. 4 is an exploded perspective view of the optical unit with shake correction function according to the first embodiment.

Fig. 5 is a perspective view of a movable body in the optical unit with shake correction function according to the first embodiment.

Fig. 6 is an exploded perspective view of a main part of the optical unit with a shake correction function of the first embodiment as viewed from the object side.

Fig. 7 is an exploded perspective view of fig. 6 viewed from the opposite side.

Fig. 8 is a perspective view showing a gimbal mechanism and a holder frame in the optical unit with shake correction function according to the first embodiment.

Fig. 9 is a longitudinal sectional view taken along line a-a of fig. 2.

Fig. 10 is a cross-sectional view taken along line B-B of fig. 3.

Fig. 11 is an enlarged cross-sectional view of a main portion of fig. 9, in which fig. 11 (a) shows a non-excited state, and fig. 11 (b) shows a state when the oscillation of the movable body is maximum.

Fig. 12A and 12B are views, with respect to fig. 11, showing a state in which the movable body moves in the optical axis direction in fig. 12A and a state in which the movable body moves in a direction orthogonal to the optical axis in fig. 12B.

Fig. 13 is a cross-sectional view similar to fig. 11 (a) of an optical unit with a shake correction function according to a second embodiment of the present invention.

Fig. 14A and 14B are sectional views showing a state where the maximum swing of the movable body is achieved, and fig. 14A and 14B are sectional views showing a state where the movable body moves in the optical axis direction, as opposed to the state shown in fig. 13.

Fig. 15 is an enlarged cross-sectional view similar to fig. 11 (a) showing a modification of the attachment of the center of gravity adjusting member.

Description of the symbols

10: fixing body

20: movable body

25: auxiliary wall part

25 a: upper end (second abutting part)

30: universal joint mechanism

35: swing center (swing fulcrum)

40: drive mechanism for correcting shake

41: magnet

42: coil

71. 72: flexible wiring board

73: package substrate

101: optical unit with correction function

110: shell body

111. 112, 112: side plate part

113: flange

120: cover frame

121: opening window

122: projection part

122 a: watch dial (first stop)

123. 224: support plate part

124: trough part

125: inclined plane (second stop part)

127: cylindrical wall

127 a: outer peripheral surface (first stop part)

127 b: lower end face (second stop part)

130: bottom cover

131: peripheral wall part

132: cut-out part

140: isolation component

210: optical module (optical element)

212: camera element (image pickup part)

213: lens holder

214: lens barrel part

215: abutment portion

216: lens cover

220: support frame

221: holder for stent

221 a: step difference part

221 b: upper end part

222: base part

223: coil holding part

224a, 224 b: corner (first contact part)

225: coil abutting part

226: convex part

227: connecting part

228: trough part

229: space(s)

230: gravity center adjusting member

231: inclined plane (second abutting part)

240: movable frame arrangement space

310: movable frame

311: protrusion part

320: ball body

330: spring for contact

411. 412: magnetic pole

413: magnetized grading line

H1, H2: at a distance of separation

L: optical axis

R1: first axis

R2: second axis

θ: angle of rotation

Detailed Description

Hereinafter, an embodiment of an optical unit with a shake correction function according to the present invention will be described with reference to the drawings.

In the following description, three directions orthogonal to each other are referred to as an X-axis direction, a Y-axis direction, and a Z-axis direction, respectively, and an optical axis L (lens optical axis/optical axis of the optical element) is arranged in the Z-axis direction in a stationary state. Among the shakes in each direction, rotation around the X axis corresponds to so-called pitching, and rotation around the Y axis corresponds to so-called yawing. Note that + X is given to one side in the X-axis direction, X is given to the other side in the X-axis direction, Y is given to one side in the Y-axis direction, Y is given to the other side in the Y-axis direction, Z is given to one side in the Z-axis direction (the object side/the front side in the optical axis direction), and Z is given to the other side in the Z-axis direction (the opposite side to the object side/the rear side in the optical axis direction). In fig. 1 to 8, the state in which one of the Z axes + Z is arranged upward is referred to as a stationary state. Hereinafter, the above-described static state will be described unless otherwise specified.

[ first embodiment ]

(schematic configuration of optical unit 101 with shake correction function)

Fig. 1 to 3 show an external appearance of an assembled state of an optical unit (hereinafter, omitted as an optical unit) 101 with a shake correction function. Fig. 4 is an exploded view of the optical unit 101 along the direction of the optical axis L. Fig. 5 is an exploded perspective view of movable body 20 of optical unit 101, which will be described later. Fig. 6 is an exploded perspective view of a main part as viewed from the object side, and fig. 7 is an exploded perspective view as viewed from the opposite side. Fig. 8 shows the gimbal mechanism 30 and the holder frame 220 described later. Fig. 9 is a longitudinal sectional view of a Y-Z plane passing through the optical axis L, and fig. 10 is a transverse sectional view of a vicinity of the gimbal mechanism 30 in the X-Y plane.

The optical unit 101 shown in these figures is a thin camera incorporated in an optical device (not shown) mounted in an imaging device such as a mobile terminal, a drive recorder, or an unmanned helicopter, and is mounted in a state of being supported by a chassis (chassis) (device body) of the optical device. In such an optical unit 101, when a shake such as a camera shake occurs in an optical apparatus at the time of photographing, a captured image is disturbed. Therefore, in the optical unit 101 of the present embodiment,: the movable body 20 including the optical module (optical element) 210 having the optical axis L extending in the Z-axis direction can be swung based on the result of the shake detected by a shake detection sensor (not shown) such as a gyroscope (gyro), thereby correcting the pitch and yaw.

In fig. 1 to 4, an optical unit 101 of the present embodiment includes: the optical module includes a fixed body 10, a movable body 20 including an optical module 210, a gimbal mechanism 30 as a swing support mechanism provided in a state of supporting the movable body 20 swingably with respect to the fixed body 10, and a shake correction drive mechanism 40 for swinging the movable body 20. As shown in fig. 10, the movable body 20 is supported by the fixed body 10 via the gimbal mechanism 30 so as to be swingable around two axes R1, R2 orthogonal to the direction of the optical axis L. One of the two axes is set as a first axis R1, and the other is set as a second axis R2. The first axis R1 and the second axis R2 are orthogonal to each other and arranged at an angle of 45 ° with respect to the X axis and the Y axis.

In the optical unit 101 of the present embodiment, the fixing body 10 has an octagonal shape when viewed from the optical axis L direction (+ Z direction).

(constitution of fixing body 10)

As shown in fig. 1 to 4, the fixing body 10 includes: a square tubular case 110 surrounding the movable body 20, a cover frame 120 fixed above the case 110 (one side + Z in the Z-axis direction), and a bottom cover 130 disposed below the case 110 (the other end side-Z in the Z-axis direction).

In the present embodiment, the case 110 is formed in a square tubular shape (in the illustrated example, a tubular shape having an octagonal cross section) by the plurality of

side plate portions

111, 112, and an inward flange 113 is integrally formed at an upper end (one + Z in the Z-axis direction).

The outer shape of the cover frame 120 in plan view is formed in an octagonal shape along the outer shape of the case 110, and is formed in a rectangular frame shape protruding radially inward from one end + Z of the case 110 in the Z-axis direction. A circular opening window 121 is formed in the center of the cover frame 120, and light from the object is guided to the optical module 210 through the opening window 121. As shown in fig. 7, a projection 122 is provided annularly on the back surface of the cover frame 120, i.e., on the other side-Z in the Z-axis direction, and support plate portions 123 for mounting a contact spring 330 of the gimbal mechanism 30, which will be described later, are provided integrally with the projection 122 at positions 180 ° opposite to each other. The support plate portion 123 protrudes toward the other side-Z in the Z-axis direction, and has a groove portion 124 formed in an opposing surface that faces in the radial direction (in the illustrated example, a direction of 45 ° with respect to the X-axis and the Y-axis).

The surface 122a of the protrusion 122 of the cover frame 120 is provided as a first stopper portion for limiting a swing allowable range of the holder frame 220 described later. In the illustrated example, since the support plate portions 123 are provided so as to face the protruding portions 122 at 180 °, the first stopper portion 122a is formed in an arc shape avoiding two portions of the two support plate portions 123.

As shown in fig. 4, the outer shape of the bottom cover 130 in plan view is formed into an octagonal shape along the outer shape of the housing 110, and a peripheral wall portion 131 that fits inside the housing 110 is integrally provided. Further, a cutout portion 132 is formed to pull out the

flexible wiring boards

71 and 72 of the shake correction drive mechanism 40, the optical module 210, and the like disposed in the housing 110 to the outside in a state of being fixed to the lower end of the housing 110. As shown in fig. 9, the

flexible wiring boards

71 and 72 are drawn out to the back side (the other side-Z in the Z-axis direction) of the bottom cover 130 through the cutout portion 132 of the bottom cover 130, fixed to the back surface of the bottom cover 130, and electrically connected to a higher-level control unit or the like provided on the main body side of the optical apparatus.

(constitution of Movable body 20)

As shown in fig. 4, 5, and the like, the movable body 20 includes: an optical module 210 including optical elements such as lenses, a holder frame (holder frame)220 holding the optical module 210, and an annular gravity center adjusting member 230 fixed to the holder frame 220.

As shown in fig. 9, the optical module 210 includes: a lens (not shown), an image pickup device (image pickup unit) 212, and a lens holder (lens holder)213 for holding an actuator (not shown) for focus driving, etc., are held on the holder frame 220 via the lens holder 213.

The lens holder 213 includes: a lens barrel portion 214 surrounding the lens group; a base portion 215 that is formed integrally with the lower end of the lens barrel portion 214 and holds an imaging element and the like; and a lens cover 216 that covers the front surface (object side surface) of the lens barrel portion 214.

As shown in fig. 5, 6, and the like, the holder frame 220 forms an outer peripheral portion of the movable body 20, and includes: a cylindrical holder holding portion 221 for holding the lens holder 213 inside, and a pedestal portion 222 having a flange-like diameter that is expanded at the lower end (the other end-Z in the Z-axis direction) of the holder holding portion 221. Further, coil holding portions 223 for holding the four coils 42 constituting the shake correction drive mechanism 40 described later are provided on the outer peripheral portion of the base portion 222 at positions radially outward of the holder holding portion 221, respectively, and a movable frame arrangement space 240 in which a movable frame 310 of the gimbal mechanism 30 described later is arranged is formed between these coil holding portions 223 and the holder holding portion 221.

The four coil holding portions 223 are disposed at 90 ° intervals around the Z axis, and are provided on one side in the X axis direction + X and the other side in the X axis direction-X, and on one side in the Y axis direction + Y and the other side in the Y axis direction-Y, respectively. Each coil holding portion 223 includes: a support plate portion 224 erected in the Z-axis direction from the peripheral edge portion of the base portion 222; a coil contact portion 225 protruding from a part of the outer surface of the support plate portion 224 and contacting the back surface of the coil 42 when the coil 42 is held; and a projection 226 projecting from the coil contact portion 225 and fitted inside the coil 42. The support plate portions 224 of the respective coil holding portions 223 are arranged so as to be orthogonal to the X-axis direction or the Y-axis direction, and thus the coil contact portions 225 and the convex portions 226 on the outer surfaces of the respective support plate portions 224 are arranged so as to face one side in the X-axis direction + X and the other side in the X-axis direction-X, Y + Y and the other side in the Y-axis direction-Y.

The annular coil 42 is mounted so as to fit into the convex portion 226 of each coil holding portion 223, and the mounting posture of the coil 42 is restricted by bringing the rear surface of the coil 42 into contact with the coil contact portion 225. Therefore, the coil 42 is provided facing one side in the X-axis direction + X and the other side in the X-axis direction-X, and one side in the Y-axis direction + Y and the other side in the Y-axis direction-Y, respectively.

In this case, the convex portion 226 of each coil holding portion 223 protrudes outward from the outer surface of the coil 42 (the surface facing the magnet 41 described later) while holding the coil 42. On the other hand, as described later, since the magnet 41 provided in the case 110 of the fixed body faces each coil 42, when the movable body 20 is displaced in the X-axis direction or the Y-axis direction by an external force, the convex portion 226 of the coil holding portion 223 comes into contact with the magnet 41, and the coil 42 is prevented from coming into contact with the magnet 41 (see fig. 12B).

The support plate portions 224 of the two coil holding portions 223 adjacent in the circumferential direction are connected to each other by the connecting portion 227. Specifically, the support plate portions 224 of the two coil holding portions 223 provided on one side + X in the X-axis direction and one side + Y in the Y-axis direction are connected by the connecting portion 227. The support plate portions 224 of the two coil holding portions 223 provided on the other side-X in the X-axis direction and the other side-Y in the Y-axis direction are connected by the connecting portion 227. Thus, the two coupling portions 227 are disposed at opposite corners intersecting at 45 ° with respect to the X-axis and the Y-axis, in other words, at positions facing each other at 180 ° in the extending direction of the first axis R1, and the groove portions 228 are formed on the facing surfaces thereof (see fig. 5 and 10).

On the other hand, the coil holding portions 223 disposed on one side + X in the X-axis direction and the other side-Y in the Y-axis direction are spaced apart from each other, and the coil holding portions 223 disposed on the other side-X in the X-axis direction and the one side + Y in the Y-axis direction are also spaced apart from each other. Therefore, the space 229 between the coil holding portions 223 is also at a diagonal angle intersecting at 45 ° with respect to the X axis and the Y axis, and in this case, is disposed at a position facing 180 ° in the direction in which the second axis R2 extends, and the support plate portion 123 of the cover frame 120 is disposed in the space 229.

The base part 215 of the lens holder 213 is disposed on the lower side (Z-axis direction) of the holder frame 220, and the lens barrel part 214 is held by the holder frame 220 in a state of penetrating the holder holding part 221 of the holder frame 220 and protruding to the + Z side in the Z-axis direction.

Further, an annular center of gravity adjusting member 230 is attached to the upper end portion (one side in the Z-axis direction + Z end portion) of the cylindrical holder holding portion 221 of the holder frame 220 so as to surround the periphery thereof. The center of gravity adjusting member 230 is provided to adjust the center of gravity position of the movable body 10 in the optical axis direction so that the center of gravity position of the movable body 10 coincides with a swing fulcrum 35 described later.

In this case, a step portion 221a is formed on the outer periphery of the holder holding portion 221, and the gravity center adjusting member 230 is mounted so as to be placed on the step portion 221a and fixed by adhesion or the like.

In the present embodiment, the holder frame 220 is formed of synthetic resin, and the holder holding portion 221, the base portion 222, and the coil holding portion 223 are integrally formed.

The image pickup device 212, the actuator for focus driving, and the like provided on the movable body 20 are connected to the flexible wiring board 71 for signal output (communication). As shown in fig. 9, the image pickup device 212 is connected to a package substrate 73 on which electronic components such as a gyroscope and a capacitor (capacitor) are packaged, and the flexible wiring board 71 is connected to the package substrate 73.

On the other hand, the coil 42 constituting the shake correction drive mechanism 40 is connected to a flexible wiring board 72 for power supply. As described above, the

flexible wiring boards

71 and 72 are pulled out from the cutout 132 of the bottom cover 130 to the outside, and are electrically connected to a higher-level control unit or the like provided on the main body side of the optical device.

As shown in fig. 9 and the like, the

flexible wiring boards

71 and 72 are bent several times below the lens holder 213 (on the other side-Z in the Z-axis direction) and then pulled out. As shown in fig. 5, the flexible wiring board 72 connected to the coil 42 is disposed between the two divided portions of the flexible wiring board 71 connected to the optical module 210, and the directions of pulling out the two

flexible wiring boards

71 and 72 to the outside are aligned. In addition, both the

flexible wiring boards

71 and 72 have flexibility, and do not hinder the movement of the holder frame 220 using the shake correction drive mechanism 40 and the optical module 210 held by the holder frame 220.

(construction of Driving mechanism for blur correction 40)

As shown in fig. 4, 6, and the like, the shake correction drive mechanism 40 is a magnetic drive mechanism that uses a plate-shaped magnet 41 and a coil 42 that causes electromagnetic force to act in the magnetic field of the magnet 41. In the present embodiment, four sets of combinations of the magnets 41 and the coils 42 are provided at intervals of 90 ° in the circumferential direction of the movable body 20 (the holder frame 220). As shown in fig. 9 and 10, each magnet 41 is held by the case 110, and each coil 42 is held by the holder frame 220, and in the present embodiment, the shake correction drive mechanism 40 is configured between the case 110 and the holder frame 220.

The magnets 41 are held on the inner surfaces of four side plate portions 111, respectively, and the four side plate portions 111 are arranged at intervals of 90 ° in the circumferential direction of the housing 110. The side plate portions 111 are respectively disposed on one side in the X-axis direction, on the other side in the + X, X-axis direction, on the one side in the + Y, Y-axis direction, on the other side in the-X, Y-axis direction. Therefore, the magnet 41 and the coil 42 face each other between the case 110 and the holder frame 220 at one side + Y in the X-axis direction + X, X and at the other side-Y in the Y-axis direction-X, Y.

In the present embodiment, the four magnets 41 magnetize the outer surface side and the inner surface side to different poles. The magnet 41 is magnetized so as to be separated into two in the direction of the optical axis L (the direction of the Z axis), and the

magnetic poles

411 and 412 located on the coil 42 side (the inner surface side) are magnetized so as to be different in the direction of the optical axis L (see fig. 6, 7, and 9). Therefore, the magnetization split line 413 for separating the

magnetic poles

411 and 412 is arranged in the direction perpendicular to the optical axis L. The two magnets 41 respectively arranged on one side + X in the X-axis direction and the other side-X in the X-axis direction are provided with magnetized division lines 413 along the Y-axis direction, and the two magnets 41 arranged on one side + Y in the Y-axis direction and the other side-Y in the Y-axis direction are provided with magnetized division lines 413 along the X-axis direction.

In the four magnets 41, the magnetization patterns on the outer surface side and the inner surface side are the same. Therefore, the magnets 41 adjacent in the circumferential direction do not attract each other, and therefore, assembly and the like are easy. The case 110 contains a magnetic material and functions as a yoke (yoke) for the magnet 41.

The coil 42 is an air-core coil having no core (core), and is held by one side + Y in the-X, Y axis direction and the other side-Y in the Y axis direction on one side + X, X axis direction of the holder frame 220 as described above. The two coils 42 disposed on one side + X, X in the X-axis direction of the holder frame 220 and on the other side-X in the X-axis direction are formed into a ring shape with the X-axis direction as the axial center direction of the coils by the windings. The two coils 42 disposed on one side + Y in the Y axis direction and the other side-Y in the Y axis direction are formed into a ring shape with the Y axis direction as the axial direction of the coils by the windings. Therefore, all the coils 42 are formed in a ring shape with the direction orthogonal to the direction of the optical axis L as the axial direction of the coils. In addition, the four coils 42 are formed in the same planar shape and the same thickness (height) dimension.

Of the four coils 42, two coils 42 each having the X-axis direction as the axial direction of the coil are formed in a rectangular shape extending in the Y-axis direction. The two coils 42, each having the Y-axis direction as the axial direction of the coil, are formed in a rectangular shape extending in the X-axis direction. In addition, all the coils 42 have long side portions arranged vertically as effective sides facing the

magnetic poles

411 and 412 of the magnets 41, and in a state where the coils 42 are not excited, the two effective sides are arranged parallel to the magnetization polarization line 413 of the facing magnet 41 at vertically equal distances from the magnetization polarization line 413 (see fig. 6 and 7).

(construction of the gimbal mechanism 30)

In the optical unit 101 of the present embodiment, in order to correct the shake in the pitch direction and the yaw direction, the movable body 20 is swingably supported about the first axis R1 intersecting the optical axis L direction, and is swingably supported about the second axis R2 intersecting the optical axis L direction and the first axis R1. Therefore, a gimbal mechanism (swing support mechanism) 30 is formed between the fixed body 10 and the movable body 20.

In the present embodiment, the gimbal mechanism 30 has a circular ring-shaped movable frame 310. As shown in fig. 5 and the like, the movable frame 310 is disposed in the movable frame disposition space 240 of the holder frame 220, and the movable frame 310 is disposed between the lower surface of the cover frame 120 of the fixed body 10 (the surface on the other side-Z in the Z-axis direction) and the upper surface of the base portion 222 of the holder frame 220 of the movable body 20 (the surface on one side + Z in the Z-axis direction) when viewed in the disposition in the Z-axis direction.

In the present embodiment, the movable frame 310 includes: the elastic metal material or the like is formed integrally with four portions at 90 ° intervals in the circumferential direction with respect to the annular center of the movable frame 310 to form protrusions 311 that face radially outward, and the spherical body 320 is fixed to each protrusion 311 by welding or the like so that the hemispherical convex surface faces radially outward.

Of the four spherical bodies 320 of the movable frame 310, two spherical bodies 320 located at opposite corners are disposed in the extending direction of the first axis R1, and two spherical bodies 320 located at the other opposite corners are disposed in the extending direction of the second axis R2.

The two balls 320 disposed in the extending direction of the first axis R1 are supported by the contact springs 330 provided in the holder frame 220, and the two balls 320 disposed in the extending direction of the second axis R2 are supported by the contact springs 330 fixed to the cover frame 120.

As shown in fig. 5, groove portions 228 that open toward one side + Z in the Z-axis direction are formed in the upper surface of the base portion 222 of the holder frame 220 at two locations of the coupling portion 227 that are located diagonally in the direction in which the first axis R1 extends. Each of the groove portions 228 is attached with a contact spring 330, and the two balls 320 located diagonally in the direction in which the first axis R1 extends are supported by the contact springs 330.

On the other hand, a pair of support plate sections 123 are formed so as to project toward-Z in the Z-axis direction at 180 ° opposite diagonal corners of the back surface of the cover frame 120, and contact springs 330 are respectively attached to the groove sections 124 on the inner side of the support plate sections 123. Further, the support plate portions 123 of the cover frame 120 are disposed in the spaces 229 between the coil holding portions 223 of the holder frame 220, whereby the contact springs 330 are disposed at two positions located diagonally in the direction in which the second axis R2 extends, and the two balls 320 located diagonally in the direction in which the second axis R2 extends are supported by the contact springs 330, respectively.

Each contact spring 330 is formed by press-molding an elastically deformable plate material made of metal such as stainless steel, and is bent into a U-shaped longitudinal section, and causes an elastic load (elastic force) to act on a contact point with the ball 320 provided on the movable frame 310 from the radially outer side toward the radially inner side. That is, the balls 320 provided on the four protrusions 311 of the movable frame 310 elastically contact the contact springs 330 attached to the cover frame 120 of the fixed body 10 or the holder frame 220 of the movable body 20 from the outside in the radial direction.

In this case, as shown in fig. 10, the contact springs 330 fixed to the holder frame 220 face each other in pairs in the direction of the first axis R1, and form a first swing fulcrum with the ball 320 of the movable frame 310. On the other hand, the contact springs 330 fixed to the cover frame 120 face each other in pairs in the direction of the second axis R2, and form a second pivot point with the ball 320 of the movable frame 310. Therefore, the swing center position (swing fulcrum) 35 of the movable body 20 is disposed at the intersection of the first axis R1 and the second axis R2, which are the combination of the first swing fulcrum and the second swing fulcrum.

In this way, the ball 320 of the movable frame 310 is swingably contacted with the contact spring 330, and the holder frame 220 of the movable body 20 is swingably supported with respect to the cover frame 120 of the fixed body 10. In the gimbal mechanism 30 configured as described above, the urging forces of the contact springs 330 are set to be equal to each other. In the present embodiment, since the magnetic drive mechanism is used as the shake correction drive mechanism 40, the movable frame 310 and the contact spring 330 used in the gimbal mechanism 30 are both made of nonmagnetic materials.

In the present embodiment, the movable frame 310 is disposed at the same height position (the same position in the Z-axis direction) as the coil holding portion 223. Therefore, the gimbal mechanism 30 is disposed at a position overlapping the shake correction drive mechanism 40 when viewed from a direction orthogonal to the direction of the optical axis L. In particular, in the present embodiment, as shown in fig. 9, the gimbal mechanism 30 is disposed at a position overlapping the center position in the Z-axis direction of the shake correction drive mechanism 40 when viewed from the direction orthogonal to the optical axis L direction. More specifically, in the non-excited state of the shake correction drive mechanism 40, the gimbal mechanism 30 is disposed at the same height position as the magnetization pole-dividing line 413 of the magnet 41 in the Z-axis direction. Therefore, the first pivot point and the second pivot point of the gimbal mechanism 30 are disposed at positions that overlap the center position of the shake correction drive mechanism 40 in the Z-axis direction, and the pivot center position 35 of the movable body 20 is also disposed at a position that overlaps the center position of the shake correction drive mechanism 40.

(mechanism for restricting a swinging allowable range and a moving range in an optical axis direction)

As described above, in the optical unit 101 of the present embodiment, the movable body 20 can swing about the swing fulcrum 35, and the movable frame 310 of the gimbal mechanism 30 is formed of an elastic material, and therefore can move in the optical axis direction within the elastic range. Further, a mechanism is provided to restrict an allowable range with respect to the shake or the movement in the optical axis direction.

Specifically, in each coil holding portion 223 of the holder frame 220 of the movable body 20, the support plate portion 224 is formed to have a size that protrudes in the Z-axis direction + Z beyond the coil 42 in a state where the coil 42 is mounted. The protruding end portion is formed along the extending direction of the support plate portion 224, and

corner portions

224a, 224b at both ends thereof abut on the surface 122a of the protruding portion 122 of the cover frame 120 at the maximum position of the swing allowable range. In this case, by providing four support plate portions 224, four support plate portions are disposed on the left and right sides of the first axis R1, four support plate portions are disposed on the left and right sides of the second axis R2, and eight

corner portions

224a and 224b are disposed in total, in a plan view seen from the + Z side in the Z axis direction. The positions of the

corner portions

224a and 224b in the Z-axis direction are set equally.

Further, since the two pieces of each support plate portion 224 are connected by the connecting portion 227 and are arranged at 45 ° with respect to the first axis R1 in the direction in which the two connecting portions 227 are connected and the second axis R2 in the direction orthogonal to the first axis R1, as shown in fig. 5, of the four

corner portions

224a and 224b arranged on the left and right sides so as to sandwich the first axis R1, two corner portions arranged at positions distant from the first axis R1 are denoted by reference numeral 224a, two corner portions arranged at positions distant from the second axis R2 are denoted by reference numeral 224b, and the two corner portions 224a arranged at positions distant from the first axis R1 are set to have the same distance from the first axis R1, and the two corner portions 224b arranged at positions distant from the second axis R2 are set to have the same distance from the second axis R2.

At the maximum position of the swing allowable range, for the swing around the first axis R1, the two corner portions 224a disposed at the positions distant from the first axis R1 are in contact with the surface 122a of the protrusion 122 of the cover frame 120, and for the swing around the second axis R2, the two corner portions 224b disposed at the positions distant from the second axis R2 are in contact with the surface 122a of the protrusion 122 of the cover frame 120.

That is, the surface (the other surface-Z in the Z-axis direction) 122a of the protruding portion 122 of the cover frame 120 abuts on the

corner portions

224a, 224b of the support plate portion 224 in the maximum swing range, and further swing is restricted. That is, the eight

corner portions

224a and 224b of the support plate portion 224 are the first contact portions of the present invention, the surface 122a of the protruding portion 122 of the cover frame 120 is the first stopper portion of the present invention, and the first contact portions and the first stopper portion constitute the swing allowable range limiting mechanism.

On the other hand, at an upper end portion (one side in the Z-axis direction + Z end portion) of the holder holding portion 221 of the holder frame 220, an annular center-of-gravity adjusting member 230 is provided. As shown in fig. 9, the vertical cross section of the center of gravity adjusting member 230 along the Z axis direction is formed in a pentagon shape, and the thickness in the Z axis direction gradually decreases toward the outside in the radial direction at one side + Z in the Z axis direction, in other words, an inclined surface 231 is formed so as to be inclined in a direction closer to the optical axis L toward the object side along the optical axis direction. Further, the inner peripheral portion of the cover frame 120 of the fixed body 10 projects radially inward from the outer peripheral surface of the center-of-gravity adjusting member 230, and an inclined surface 125 (inclined in the direction closer to the optical axis L toward the object side along the optical axis direction) is formed on the back surface side of the inner peripheral portion thereof, that is, on the other side-Z in the Z axis direction, so as to gradually increase the thickness in the Z axis direction as it goes radially outward. The inclined surface 231 of the center of gravity adjusting member 230 faces the inclined surface 125 of the cover frame 120, and a gap having the same thickness is formed between the facing portions. When the movable body 20 including the center of gravity adjusting member 230 moves to one side + Z in the Z-axis direction (optical axis direction) by an external force, the inclined surface 231 of the center of gravity adjusting member 230 abuts on the inclined surface 125 of the cover frame 120, and further movement can be restricted. That is, the inclined surface 231 of the gravity center adjusting member 230 constitutes the second contact portion of the present invention, the inclined surface 125 of the cover frame 120 constitutes the second stopper portion of the present invention, and the both

inclined surfaces

231 and 125 constitute the optical axis direction movement restricting mechanism with respect to the movable body 20.

In this case, the distance H1 in the Z axis direction (optical axis direction) of the gap between the inclined surface 125 of the cover frame 120 and the inclined surface 231 of the gravity center adjusting member 230 is set smaller than the distance H2 in the Z axis direction (optical axis direction) between the

corners

224a and 224b of the support plate portion 224 of the holder frame 220 and the protruding portion 122 of the cover frame 120, and when the movable body 20 moves by a predetermined amount or more in the Z axis direction, the

corners

224a and 224b of the support plate portion 224 of the holder frame 220 do not abut on the protruding portion 122 of the cover frame 120, and the inclined surface 125 of the cover frame 120 abuts on the inclined surface 231 of the gravity center adjusting member 230.

The inclined surface 125 of the cover frame 120 and the inclined surface 231 of the gravity center adjusting member 230 are formed in an inclined shape substantially along the connecting direction during the swinging, and the distance H1 and the size of the facing surface of the

inclined surfaces

125 and 231 are set to such an extent that they do not hinder the swinging of the movable body 20, and the dimension at which the

inclined surfaces

231 and 125 do not contact each other is set to the maximum position of the swinging allowable range of the movable body 20.

As shown in fig. 9, a spacer member 140 positioned below the base part 215 of the lens holder 213 (the other side-Z in the Z-axis direction) is provided on the other side-Z in the Z-axis direction of the holder frame 220, and after the

flexible wiring boards

71 and 72 are fixed to the spacer member 140, the

flexible wiring boards

71 and 72 are pulled out to the outside.

(Effect)

In the optical unit 101 with shake correction function configured as described above, the movable body 20 can be swung around the first axis R1 or the second axis R2 by the gimbal mechanism (swing support mechanism) 30 and the shake correction drive mechanism 40 to correct the pitch and yaw. In the shake correction control, when the movable body 20 swings as shown by the arrow in fig. 11 (b) and the corner portions (first contact portions) 224a and 224b of the support plate portions 224 of the holder frame 220 come into contact with the surface (first stopper portion) 122a of the protrusion portion 122 of the cover frame 120, further swing is restricted. The angle θ when the

corner portions

224a and 224b of the support plate portion 224 abut against the protruding portion 122 of the cover frame 120 is set to, for example, 10 °, and the swing range is limited to the angle range.

At this time, the center of gravity adjusting member 230 also swings integrally with the holder frame 220, and the outer inclined surface 231 does not contact the inner inclined surface 125 of the cover frame 120 as described above, and does not hinder the swing. The convex portion 226 of the holder frame 220 facing the magnet 41 of the fixed body 10 is also spaced apart from the magnet 41 by a predetermined interval so as not to contact the magnet 41 during the swinging.

On the other hand, when the movable body 20 moves in the optical axis direction during a drop impact or the like, the movable body moves as indicated by the arrow in fig. 12A, and when the inclined surface (second contact portion) 231 of the center of gravity adjusting member 230 comes into contact with the inclined surface (second stopper portion) 125 on the inner periphery of the cover frame 120, further movement is restricted. At this time, the upper ends (the front ends on the + Z side in the Z-axis direction) of the

corner portions

224a and 224b of the support plate portion 224 of the holder frame 220 do not reach the surface 122a of the protruding portion 122 of the cover frame 120, and a gap is left between the upper ends and the surface of the protruding portion 122.

When the movable body 20 moves in the direction perpendicular to the optical axis L during a drop impact or the like, the movable body moves as indicated by the arrow in fig. 12B, and when the convex portion 226 of the holder frame 220 comes into contact with the magnet 41, further movement is restricted.

In this way, in the optical unit 101 with shake correction function according to the above-described embodiment, the allowable range of the swing of the movable body 20 is restricted by the corner portions (first contact portions) 224a and 224b of the support plate portion 224 of the holder frame 220 and the surface (first stopper portion) 122a of the protruding portion 122 of the cover frame 120, and when an impact is applied by dropping or the like, the protrusion of the movable body 20 in the optical axis direction is restricted by the inclined surface (second contact portion) 231 of the gravity center adjusting member 230 and the inclined surface (second stopper portion) 125 of the cover frame 120, and the movement of the movable body 20 in the direction orthogonal to the optical axis L is restricted by the protruding portion 226 of the holder frame 220 and the magnet 41. Therefore, excessive deformation of the movable frame 310 and the like of the gimbal mechanism 30 can be prevented, and durability can be improved.

In this case, the distance H1 in the optical axis direction between the inclined surface (second contact portion) 231 of the gravity center adjusting member 230 that restricts movement in the optical axis direction and the inclined surface (second stopper portion) 125 of the cover frame 120 is set smaller than the distance H2 in the optical axis direction between the corner portions (first contact portions) 224a, 224b of the support plate 224 of the holder frame 220 that restricts the allowable range of swing and the protruding portion 122 of the cover frame 120 (in other words, the distance H in the optical axis direction between the first contact portion and the fixed body), so that the overall size in the optical axis direction can be reduced as compared to a case where the movement restricting mechanism in the optical axis direction is not provided, and the optical unit 101 with the shake correcting function can be downsized.

Further, the following configuration may be adopted: the shock absorbing sheet is attached to the surface 122a or the inclined surface 125 of the protruding portion 122 of the cover frame 120 to absorb the shock of the collision of the movable body 20.

In the case of the above embodiment, since the center of gravity adjusting member 230 is disposed so as to overlap the inner peripheral portion of the cover frame 120 such that the annular center of gravity adjusting member 230 protrudes to one side + Z in the Z-axis direction and the

inclined surfaces

231 and 125 are formed between the center of gravity adjusting member 230 and the inner peripheral portion of the cover frame 120, the inside is hidden when viewed from the object side in the optical axis direction, and thus foreign matter such as dust is prevented from entering between the

inclined surfaces

231 and 125, and the design is also excellent.

Further, both the

inclined surfaces

231 and 125 are formed in a conical surface shape, but may be formed in an arc surface shape so as to follow the locus of the movable body 20 at the time of swinging, the inclined surface (second contact portion) 231 of the center of gravity adjusting member 230 may be formed in a convex arc surface, the inclined surface (second stopper portion) 125 of the cover frame 120 may be formed in a concave arc surface, and the convex arc surface and the concave arc surface may be formed so as to face each other. In this case, the distance H1 between the facing surfaces of the inclined surfaces (arcuate surfaces) can be further reduced.

[ second embodiment ]

Fig. 13, 14A and 14B are cross-sectional views similar to fig. 11 (a), 11 (B) and 12A of the first embodiment of the optical unit with a shake correction function according to the second embodiment of the present invention. In the second embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be simplified.

In the first embodiment, the first contact portion is formed by the

corner portions

224a, 224b of the support plate portion 224 in the holder frame 220, the first stopper portion is formed by the surface (surface facing the other side-Z in the Z-axis direction) 122a of the protruding portion 122 of the cover frame 120, but in the second embodiment, the first contact portion is formed by the

corner portions

224a, 224b similar to those in the first embodiment, the cylindrical wall 127 is integrally provided on the inner peripheral portion of the cover frame 120 facing the other side-Z in the Z-axis direction, and the outer peripheral surface 127a of the cylindrical wall 127 forms the first stopper portion.

Further, when the first contact portion and the first stopper portion are in point contact, strictly speaking, in the first embodiment, the vertex of the coil 42 side of the

corner portions

224a, 224b of the support plate portion 224 of the first contact portion is in contact with the first stopper portion, and in the second embodiment, the vertex of the support plate portion 224 on the opposite side to the coil 42 side is in contact with the first stopper portion. When the first stopper portion sticks to the cushion sheet, the cushion sheet is elastically deformed at the time of collision, and therefore, it is assumed that wide portions of the

corner portions

224a and 224b from the coil 42 side to the opposite side come into contact with the first stopper portion. Therefore, in the present specification, the first contact portion is defined to include the coil 42 side of the

corner portions

224a and 224b and the opposite side thereof.

In addition, an auxiliary wall portion 25 (also denoted by a reference numeral in fig. 8) having a smaller height in the Z-axis direction than the support plate portion 224 is provided on the opposite side of the surface of the support plate portion 224 to the coil 42 side in the holder frame 220, an upper end 25a of this auxiliary wall portion 25 is used as a second contact portion, and a lower end surface (the other end surface-Z in the Z-axis direction) 127b of the cylindrical wall 127 of the cover frame 120 is configured as a second stopper portion.

In the second embodiment, the center of gravity adjusting member 230 is formed in a rectangular shape in vertical section.

In the second embodiment, the distance H1 in the optical axis direction (Z-axis direction) between the second contact portion 25a and the second stopper portion 127b during non-excitation is also set smaller than the distance H2 in the optical axis direction (Z-axis direction) between the

first contact portions

224a and 224b and the cover frame 120.

In the first embodiment, since the first stopper portion is formed by the plane (the surface 122a of the protruding portion 122 of the cover frame 120) orthogonal to the Z-axis direction, when the

first contact portions

224a and 224b contact the first stopper portion 122a, the movement of the

first contact portions

224a and 224b in the + Z direction in the Z-axis direction is also restricted. In contrast, in the second embodiment, the first stopper portion is the outer peripheral surface 127a of the cylindrical wall 127 of the cover frame 120 and is formed along the Z-axis direction, and therefore, at the maximum swing position where the

first contact portions

224a and 224b contact the first stopper portion 127a, the

first contact portions

224a and 224b can move in the Z-axis direction along the first stopper portion 127a, but at the maximum swing position, since the second contact portion 25a and the second stopper portion 127b are arranged to overlap in the Z-axis direction (optical axis direction), even if the movable body 20 attempts to move in the Z-axis direction due to a drop impact or the like at the maximum swing position, the second contact portion 25a contacts the second stopper portion 127b, and the movement thereof can be restricted.

[ modification of mounting of center of gravity adjusting Member ]

In the first embodiment, the center of gravity adjusting member 230 is fixed to the outer periphery of the cylindrical holder holding portion 221 of the holder frame 220 by adhesion or the like, and since the holder frame 220 is formed of synthetic resin, as shown in fig. 15, the upper end of the holder holding portion 221 is formed high as shown by the two-dot chain line, and after the center of gravity adjusting member 230 is placed on the step portion 221a, the upper end 221b of the holder holding portion 221 is pressed against the upper surface of the center of gravity adjusting member 230 while being thermally deformed, and the thermally deformed upper end 221b and the step portion 221a are fixed by caulking.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

For example, although the universal joint mechanism 30 is configured such that the ball 320 fixed to the movable frame 310 is brought into contact with the contact spring 330, the following configuration may be adopted instead of the ball: a spherical tip end surface formed by forming the tip end surface of a rod-like member or the like into a spherical shape is brought into contact with a contact spring.

In addition, although the optical unit having the pitch and yaw correction functions has been described in the present embodiment, a configuration having a roll (rolling) correction function in addition to the pitch and yaw may be adopted.

Further, as the support mechanism for supporting the movable body 20 to the fixed body 10, a mechanism supported swingably by the universal joint mechanism 30 is constituted, but a support mechanism using a pivot shaft substantially along the direction of the optical axis L may be employed, in which case the tip end surface of the pivot shaft is formed into a spherical tip end surface, and the pivot shaft swings about the spherical tip end surface in the direction intersecting the optical axis L.

The magnet 41 of the shake correction drive mechanism 40 may be provided in the case 110 of the fixed body 10 and the coil 42 may be provided in the holder frame 220 of the movable body 20, or the magnet 41 may be provided in the holder frame 220 of the movable body 20 and the coil 42 may be provided in the case 110 of the fixed body 10. In this case, the holder frame 220 is provided with a magnet holding portion instead of the coil holding portion. In the present invention, the coil holding portion and the magnet holding portion are collectively referred to as a holding member.

Claims

1. An optical unit with a shake correction function, comprising:

a fixed body;

a movable body including an optical element;

a swing support mechanism configured to support the movable body so as to be swingable with respect to the fixed body; and

a shake correction drive mechanism that swings the movable body;

wherein the movable body is provided with a first abutting portion that abuts against the first stopper portion of the fixed body when the maximum oscillation is made, and a second abutting portion that abuts against the second stopper portion of the fixed body when the movable body is moved in the optical axis direction of the optical axis of the optical element,

the second stopper portion and the second contact portion are spaced apart from each other by a space that does not contact each other when the movable body swings, and,

the distance between the second stopper and the second contact portion along the optical axis is set smaller than the distance between the first contact portion and the fixed body along the optical axis.

2. The optical unit with shake correcting function according to claim 1,

the second contact portion and the second stopper portion are formed as inclined surfaces inclined in a direction toward the optical axis side as they approach the object side.

3. An optical unit with a shake correcting function according to claim 2,

the opposing portions of the second contact portion and the second stopper portion are formed as arc surfaces around a pivot of the movable body.

4. The optical unit with shake correcting function according to claim 1,

the second contact portion and the second stopper portion are provided in a ring shape along a circumferential direction around the optical axis.

5. The optical unit with shake correcting function according to claim 4,

the second contact portion and the second stopper portion are arranged so that at least a part of them overlaps with the optical axis direction when the shake correction drive mechanism maximizes the swing.

6. The optical unit with shake correcting function according to any one of claims 1 to 5, wherein the movable body includes:

an optical module having the optical element; and

a center-of-gravity adjusting member provided on an object side of the optical module in the optical axis direction to adjust a center-of-gravity position of the movable body in the optical axis direction,

wherein the center of gravity adjusting member is provided with the second abutting portion.

7. The optical unit with shake correcting function according to any one of claims 1 to 5,

the drive mechanism for correcting jitter comprises a magnet and a coil,

one of the magnet and the coil is provided to the fixed body, and the other is provided to the movable body,

the first contact portion is provided on a holding member for holding the magnet or the coil on the movable body.

8. The optical unit with shake correcting function according to claim 6,

the drive mechanism for correcting jitter comprises a magnet and a coil,

9. The optical unit with shake correcting function according to claim 1,